1. [Sleep and growth-- 1. Children sleep ten hours [a day]. 2. Adults sleep eight hours.] [graphic] Published / Created: [1930s] Call Number: Poster0222 Image Count: 2 Resource Type: still image Found in: Medical Historical Library, Cushing/Whitney Medical Library > [Sleep and growth-- 1. Children sleep ten hours [a day]. 2. Adults sleep eight hours.] [graphic]